Operating Environment Precautions - Omron SYSMAC CPM2B Operation Manual

Operating Environment Precautions

!WARNING
!Caution Execute online edit only after confirming that no adverse effects will be
!Caution Tighten the screws on the terminal block to the torque specified in the opera-
!Caution When connecting the PLC to a personal computer or other peripheral device,
4 Operating Environment Precautions
!Caution Do not operate the control system in the following places:
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• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.
• The PLC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter-
measure for such problems, external safety measures must be provided
to ensure safety in the system.
When transferring programs to other nodes, or when making changes to I/O
memory, confirm the safety of the destination node before transfer. Not doing
so may result in injury.
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
tion manual. The loose screws may result in burning or malfunction.
either ground the 0-V side of the PLC or do not ground the PLC at all.
Although some grounding methods short the 24-V side, as shown in the fol-
lowing diagram, never do so with the PLC.
INCORRECT Grounding: Shorting the 24-V side of the Power Supply
Non-isolated DC power
supply
24 V
0 V
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidity outside the range specified
in the specifications.
• Locations subject to condensation as the result of severe changes in tem-
perature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salts.
0 V
PC Peripheral device
4
0 V
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